The next thing to plot on the calendar is your free preview call, if you decide to have one.

As for when to host your free preview call, you want to choose a date that is close enough to your launch day so that people don't forget about it. If you are doing a pre-order period, you can have the people on your call go straight to your sales page to pre-order.

Perhaps you even offer the people on the free preview call a slight discount (10-15%) off the cost of the e-book. If you aren't doing a pre-order period, you definitely want to keep these two dates close so that the people on the call will be anticipating the information but not for too long.